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ADM1029ARQZ-R7 数据表(PDF) 42 Page - ON Semiconductor

部件名 ADM1029ARQZ-R7
功能描述  Dual PWM Fan Controller and Temperature Monitor for High Availability Systems
PDF  50 Pages
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制造商  ONSEMI [ON Semiconductor]
网页  http://www.onsemi.com
标志 ONSEMI - ON Semiconductor

ADM1029ARQZ-R7 数据表(HTML) 42 Page - ON Semiconductor

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Register 09h – Set Fan x Full Speed (Power-On Default 00h)
Bit
Name
R/W
Description
0
Fan 1 Full Speed = 0
R/W
When set to 1 Fan 1 will run at Full Speed.
1
Fan 2 Full Speed = 0
R/W
When set to 1 Fan 2 will run at Full Speed.
2
Reserved
R
Unused. Will read back 0.
3
Reserved
R
Unused. Will read back 0.
4
Reserved
R
Unused. Will read back 0.
5
Reserved
R
Unused. Will read back 0.
6
Reserved
R
Unused. Will read back 0.
7
Reserved
R
Unused. Will read back 0.
Register 0Ch – Fan Spin-Up Register (Power-On Default 03h)
Bit
Name
R/W
Description
<7:4>
Reserved
R
Unused
3
Spin-up Disable
R/W
When this bit is set to 1, fan spin-up to full speed will be disabled.
<2:0>
Fan Spin-up Time
R/W
These bits select the spin-up time for the fans
000 = 16 seconds
001 = 8 seconds
010 = 4 seconds
011 = 2 seconds (default)
100 = 1 second
101 = 0.25 seconds
110 = 1/16 second
111 = 1/64 second
Register 10h, 11h – Fan x
* Status (Power-On Default 0000 0?0?)
Bit
Name
R/W
Description
0
Missing = x
R
Reflects the state of Pins 4/21. Low means Fan x
* is installed, High means it
is missing. This bit will automatically return Low if a missing fan is replaced.
1
Missing _L = 0
R/W
This bit is edge-triggered and latches a Fan x
* missing event on removal of
Fan x
*. This bit is cleared by writing a 0 to it.
2
Fault_ = x
R
Inverse of Pin 2/23. Low on pin means Fan x
* has a fault (Pins 2/23 Low),
High on pin means it is OK. This bit will automatically return Low if Pin 2/23
goes high.
3
Fault_L_ = 0
R/W
This bit is edge-triggered and latches a Fan x
* fault event on Pin 2/23. This bit
is cleared by writing a 0 to it. If the PRESENT pin for a fan input is high (fan
not installed) this bit will be cleared automatically.
4
Sleep = 0
R/W
When this bit is set, Fan x
* will be stopped and no Fan x* faults will be
monitored. If Bit 4 in Fan x
* Fault Action Register is set then Fan x* will go
to Alarm Speed if an overtemperature event is detected as per settings in the
Temp Fault Action Registers.
5
Hot Plug Priority
R/W
This bit indicates whether Fan x
* runs at Hot-Plug Speed (bit set to 1) or
Alarm Speed (bit set to 0) if both modes are triggered.
6
Tach_Fault_L
R/W
Latches a Fan x
* Tach fault. This bit is cleared by writing a 0 to it. If the
PRESENT pin for a fan input is high (fan not installed) this bit will be
cleared automatically.
7
Hot_Plug_L
R/W
This bit is edge-triggered and latches a Fan x
* Hot-Plug event which is the
insertion of Fan x
*. (Note difference to Bit 1) This bit is cleared by writing a 0
to it. If a fan is Hot-Plug installed, it will run at Normal Speed.
NOTES
*“x” denotes the fan number. Register 10h is for Fan 1 and Register 11h is for Fan 2.
Question marks on this and following pages indicate bit settings that depend on the state of certain pins on power-up.
ADM1029



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